Oh, I see. So it was more of a question that I could not observe how this would be built than its effectiveness per se. Thanks for clarifying. On a side note,

Oh, I see. So it was more of a question that I could not observe how this would be built than its effectiveness per se. Thanks for clarifying. On a side note, they mention one equipment like that in this novel(a hell of a good scifi): The Martian, by Andy Weir. Available for free online, really funny.